package demo4;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Scanner;

public class LoginDemo {
    public static void main(String[] args) throws SQLException, ClassNotFoundException {
        Connection connection = SqlConnection.getCon();
        Scanner  scanner = new Scanner(System.in);
        System.out.println("请输入用户名");
        String username = scanner.next();
        System.out.println("请输入密码");
        String password = scanner.next();
        String sql = "select * from users where username = ? and password = ?";
        PreparedStatement preparedStatement = connection.prepareStatement(sql);
        preparedStatement.setString(1,username);
        preparedStatement.setString(2,password);
        ResultSet resultSet = preparedStatement.executeQuery();
        if(resultSet.next()){
            String name  = resultSet.getString("username");
            String  pwd = resultSet.getString("password");
            System.out.println("用户名是："+name);
            System.out.println("密码是："+pwd);
            System.out.println("登录成功");
        }
        else{
            System.out.println("登录失败");
        }
    }
}
